Fuel-feeding apparatus for internal-combustion engines.



- T. l. COCHRAN.

FUEL FEEDING APPARATUS FOR INTERNAL comusloN ENGINES. APPUCAT-IO'N FIL-ED DEC.'21. 1916.

1,256,519. mental EN.. 19,1918.

3 SHEETS-SHEET l.

WITNEJJES +-f- MENTON f L AM www.

A' roRN T. l. COCHRAN.

FUEL FEEDlNG APPARATUS FOR INTERNAL CoMsUsTmN ENGINES APPLICATION FILED DEC.,2I. |916.

INVENTOR w/ALHVHMDNHHM. 5244.4,

WITNES UJT ATTORNEY T. l. COCHRAN.

FUEL FEEDING APPARATUS FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED 050.21.1916.

Patented Eeb.19, 1918.

3 SHEETS-SHEE. 3.

WTTNEQMJ Y I INVENIOR 94.BZYZ. Mig

l ATTORNEY 'HQMS I. COCHRAN, QF DETROIT, MICHGN.

Specification of Letters Patent.

.lfntented Application filed Becember 21, i916. Serial No. 138,252.

To all 'U5/'Loin it may Concern: l

Be it known that I, THOMAS l. Gooi-IRAN, a citizen of the lfnited States, residing at Detroit, count)v of Wayne, State or' Michigan, have invented a certain new and useful Improvement in Fuel-Feeding Apparatus for vluternal-Combustion Engines, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make' and use the same, reference being had to the accompanying drawings, which form a part of this specification.

this invent'on relates to fuel-feedingapparatus for internal combustion engines, and has for its object an improved construction wherebytho quantityv oi' gasolene. or other liquid fuel supplied to the earbureter from the main supply tank is kept substanti'all)v constant, whether the vehicle be run- ,ningon a level, on a laterally slanting road, up hill` or down hill; thus there is yavoided either the liooding of the carburetor or the 'feeding to it of an insutlicient supply of' gasolene. The device is adapted and in fact designed to respond unusually quickly to the various running conditions which are, ordinarily encountered.

In the drawings:

Figure 1 is a vertical vsectional elevation of my improved construction.

Fig. 2 is a plan view of the top portion of the casing` the relative position oljcer-` tain of the parts being shown in dotted lines.

Fim 3 is a vertical sectional view of a slightly modified form of suction valve, vand of the adjacent portions of the casing.

Fig. is a vertical sectional elevationoiC another modification, in which the suction valve and air Vent are located directly above the float which actuates them.

In Fig. l, A represents the shell or casthe device, which is separated by a diaphragm B into the lower chamber C and upper chamber D: these. are connected by the .pipe E, and the orifice E in the diaphragm, and at the bottom of thepipe E is loc: ted a check valve of any suitable type, designed to be closed by suction, such for example as the ball'F, seating in the tapering outlet portion F of the pipe E, and being held from'falling out, when not sucked onto its seat, by the pin or bar F2. From the upper portion of this lower chamber C rises the. air inlet pipe G.`

The gasolene inlet for the mg ot upper chamber D may be located in any desired part -o'l the upper portion of the chamber: in Fig. l it is shown at l. Rising through the central portion of the upper chamber l) is a guidetulie H over which the central pipe li ot the 'float ,l slidably engages. The upper portion of the pipe K is most negligible until after the pis" has been positively depressed b v the ra.. ng ol the lever L b v the float J, as hereinafter de-` scribed; arter the plunger N hasI covered the sudction port R. howeve" the seating action of the plunger is quick and sharp.

rilhe airvalve Si in 'the upper portion of the shell is preferably located so that bore is directly above the lever L. When the lever li is in lowered position, the. stem T, whose lower end is attached to the lever lh intermediate its end and its point ol pivotino, extends upwardlyand slidablv engages in the bore T but not far enough to displace the ball V from its seat. V. lVhen, however` the lever L is raised, the ball V is unseated. permitting air to enter the chamber to counteract the vacuum effect caused by the engine suction through the valve M.

The operation ot this device is as follows:

Gasolene is admitted to the shell A through the gasolene inlet i from the stortanln'which is generally located in the rear of the vehicle. As long:A as there is no suctionA from the engine manifold, the gasolene passes through Athe pipe E and past the unseated ball valve F, Ti"Jhcn this is lilled, or when suction begins 'from the engine manifold, the ball valve F is drawn to position of closure over the end of the pipe E, and instead ot' falling-into the lower chamber C of the shell., gasolene-hegins to accumulate in the upper chamber D, linallv causing the lioat J to rise. vThe slotted pipe K, on the upper part of the oat el engages the lever L, with its lower slotted as at K', and. "through it engages the free end ot' the liu'er the pipe E.

- a thicker. side 'wail for ates to depress the niston N enough to cover- 4the'upper edge K2' edge I@ though only after the float has risen appreciably,l and thereafter tends to.

V of the air valve S, thus yoi" thezslot in the pipe-K. The exposure of the interior of tliempper chamber l) to atmospheric pressure in turn ends the sue tion pull on the ball valve F, at 'the loase Ao1" the pipe E, allowing the gasoiene inthe uppeipchainber'D to resume 'liowing therethrough, and consequently allowing the iioat .J to' fall once more.

Due/to the slottingot th pipeK, the first4 portioii'of the fallut tlie'ioat does not affect the lever, just as the irstportion of its rising. ii'ioven'ient does not raise the lever L. Vihcn, hou/'e 7er, ot the slot in the pipe K encounters the lever L, it first draws the free end. thereof downwardly as slowly as the gasolene levelin the upper chamber D is droppino'. valvenieinber N is being raised by they dropping of the lever L, the stein T of the air valve, whosev lower end ispivoted to the lever4 L, is also-heing drawn down, enf abling the' ball. V'. to seat, thus closing 'the -aii valve A 'slight further downward movement .of the lever L and consequent This in turn forces the stein 4`T v the interior of Y At the' saine time that the.

raising of the valve piston N results in the uncovering .of the suction port R, thus causing resumption of the suction inliiience from the engine manifold upon the interior of the upperchainbor D, and conseoliienrtli7 Aupon the hall Valve l? at the lower end of ln Fifi. 3 have shown a somewhat in'odi.- 'tied construction, in which the `functions of the suction valve andoair valve are united iii one shell. 'in place oi the separate airvalve S and its actuating stein'T, provide shell Mtth'rough it extends a here Y, lead- ,ing to the outer air in the sanie manner-as the valve S of Fig. 1. ,Theiipper en d of the` 'bore or air port Y is closed by the plunger N when that member is in raised position and the outer' or free end et the lever L is in lowered position, in the same manner that the stein T falls short oi? unseating the ball V '(Figfll. But as soon as the l gradual raising of the free end of the lever L operthe-'port 2R, the resultant strong suction the suction -valve- .with the gasolene level,

opening of the suction portE makes the resto'lf' its movement practically instantaneous. ,i j

' In Fig'. 4, the suction valve and vent .port

'are located' in line with thel upwardly eige tended vertical axis of the central guide talee i, H and Ot the float J. lln this forn'nthe iever is of the iiiterinediatel;T pivoted type, shown at YV; the weight W tends to nialietlie --opposite end of the lever follow the up ward travel of the cross-oar V172, yits inost. important function being; the hoiding `up of the sleeve Z, after it has heen raised so as to cover the'port Z until the all oi' {loan-because of the drop in the ggasol level, pulis it down, 'overcomingl the iv of iV. With the sleeve r e iii closure posltion over the port' Z', the resultant strongv suction then acts, on the saine principle is before, todraw the plunger upward .with a quick movement, thus exposing lower end of the'aii' vent X and hrealring the suction on the lower end oit 'the pipe E in the lower chamber C; the rei sultant drop' in the ,gasolene ievel and consequently in 'the position of the tioat il s the dropping ofthe veitia'l' 'vi/ anu ,its cross-har Z2, thus permitting the sion* uncovering; o'l the suction vent Zi", because 'the sleeve@ is no longer heid up tij;

cross-bar Z2. vThe :turther drop oit' the ton X serves to close the air vent sage X. y

l 'hat ciaiin is:- i.

l. Tin fuel suppiy apparatus combustion engines in combination vita plurality apertured casing, a como tion to a suction source, provided. fait suction port, connected with one of the ape tures, a valve adapted to control said munication and to close and open the .Juction port therein by its movement towa and away from its seat, an air valve ada@ i to control another'of the apertures tu casing, a lever rncinloer With'which each said valves is operatively connected and tij; whose pull the initiai closing and opening movements of said first nained valve are brought about to effect the closure androY ing olf the suction port, and a float nieta a' ,l lever-ii `with which the free of slip connection, whereby the initi ments thereof and consequentlyo nected 'valve members in either dependent upon the rise and i" after wliieh c is free to move independently of neat. in. response to the pull of said first named va ver ' due to the changed suction conditions'within the casing resulting from its closure or 2. In combination with ii having a plurality ot apertures, a iloat therein, a.' communication between one ot 'the apertures in the casing fand a suction source, alici mally open suction port in scifi ciroiaiuiiicamember controlling said communication, a

normally open suction vent connected with said communicatlon and adapted to be l closed andopened by the initial movement of the valve toward and away from its seat, a Heat in said upper chamber, and a lever member, operatively connected with said valve and deriving its primary movement in either direction 'from said float.

9. A suction valve mechanism for fuel- ;tceding apparatus, comprising a shell provided with an engine manifold connection and an appartenant suction port,'a valve member adapted to control the manifold connection when in seated position and to close said suction port previous to its seating and to still be in position of closure tliereover after its movement away from its seated position has begun, and a float-actuated lover member operatively connected with said valve, adapted to initially actuate said valve toward and away from its seat to an extent s'uiicient to respectively open and close the suction port, the connection of said lever with the lioat`being such that after such opening and closing of the suc tion port has been accomplished, the valve 'and its connected lever are free to respond to vthe changed suction conditions Within the shell resulting from the closure and opening meente of the suction port, and a normally closed air valve adapted to be openedand closed by the suction-influenced later nibvement of said level` and suction valve 10; In combination with an apertured casing, a communication between one of the apertures and a suction source, said communication having a suction port, a valve controlling said communication and the suction port, said suction port being adapted to be blanked and uncovered `by the initial movement of said valve toward closing and opening positions respectivelyrwitli respect to said communication, an air port adapted to be opened and closed coincidently with the movement of the valve, a iioat Within said casing, and a lever memberfor` actuatim: said valve in the' initial stages of its opening and closing movements,I said lever member having a slip connection with said float whereby it is actuated thereby. sufficiently in either direction to positively effeet the blanking and uncovering respec- 

